Table 1.

Mean position of the resultant center of pressure position in the base of support. The CoP is measured from forelimbs, and this value is divided by the distance between the forelimbs and the hindlimbs placement. Thus a value of 0.5 is centered between the two limb pairs. High ratios indicate that the COP is near the hindlimbs, and low ratios that it is near the forelimbs.

Activity	Mean position ratio
Operates during quiet stance (n=6)	0.46
Normal Rats during quiet stance (n=8)	0.75
Operates with phantom attached prior to perturbation (n=6)	0.55
Normal Rats with phantom attached prior to perturbation (n=8)	0.65